JPS60109059A - Loading device for magnetic disk to driving device - Google Patents

Abstract

PURPOSE:To chuck a disk securely even when a small-sized permanent magnet is used by pressing a disk pack in forcibly in the process of loading the disk pack so that the gap between the chucked member of the magnetic disk and a chucking member is minimum. CONSTITUTION:The disk pack 10 is inserted into an opening for insertion and extraction while a holder part 30 is at the 1st position where it is open at a specific angle. Then when the holder part 30 is rotated clockwise around a support shaft 25, a lock pin 52 abuts on the pawl tip part of a lock plate 51 to stay at the 2nd position, the chucked member 3 of the magnetic disk in the disk pack approaches the chucking member 23, and a pressure member 33a presses the chucked member 3 against the chucking member 23 by force eventually to hold it suctionally. Then when the pressing to the holder part 30 is released, the holder part 30 returns counterclockwise to lock the lock pin 52 to the lock plate 51, and magnetic recording and reproduction are carried out in this state.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a device for mounting a magnetic disk to a drive device, more specifically, a device for mounting a magnetic disk in a magnetic disk drive device, and more specifically, a jacket containing a magnetic disk is detachably mounted to a magnetic disk drive device of a magnetic recording and reproducing device. The present invention relates to a device for

(Prior art) In recent years, two-dimensional semiconductor image sensors have been used to capture subject images photoelectrically and
The image signal is transferred to a small disc-shaped magnetic recording medium (
A so-called electronic camera system that magnetically records data on a magnetic disk (hereinafter referred to as a magnetic disk) has been developed, and a small magnetic disk recording and reproducing device using the magnetic disk described above is also used as a memory for data such as a hand belt computer. It's starting to look like this.

In such a small magnetic disk, a permanent magnet is used as a chucking means, that is, as a means for fixing the rotating shaft of the motor etc. and the magnetic disk in order to drive the magnetic disk rotationally by a motor etc. So-called magnetic chucking, which is used in combination with a ferromagnetic material (for example, an iron plate) provided on the magnetic disk, is employed. . The reason for using this magnetic chucking is that the chucking mechanism would be complicated if the conventional large magnetic disks were clamped and fixed using mechanical pressure.
This is because the thrust (shaft pressure) on the rotating shaft increases and the rotational load on the motor increases, resulting in an increase in power consumption during Tanabata.

However, the conventional magnetic chucking described above has the following drawbacks. In other words, the magnetic attraction force that acts between a permanent magnet and a ferromagnetic material such as an iron plate is inversely proportional to the square of the distance, so as shown in Figure 1, it is strong when the gap is small. However, as the gap becomes larger, it decreases dramatically. Therefore, in order to attract the chucked member (for example, an iron plate) provided on the magnetic disk housed in the jacket to the above-mentioned permanent magnet, the chucked member must be pulled away using only the inherent attraction force of the permanent magnet. It was necessary to completely attract the magnet, and it was necessary to use a permanent magnet with a strong attraction force.

However, magnets with strong attractive force are expensive, relatively large, and heavy, making them unsuitable for small-sized magnetic distribution reproducing devices.
If you try to pull the magnetic disk, after being chucked, the force will be much stronger than the force required to transmit the rotational torque of the motor, and conversely, the magnetic disk will be pulled away from the drive device. When it is removed, the removal load becomes large, making it very inconvenient to use.

(Objective) The object of the present invention is to solve the above-mentioned conventional drawbacks by using a magnetic force that is relatively weak, and which can reliably chuck a magnetic disk to the main body of a drive device even when a small permanent magnet is used. An object of the present invention is to provide a device for mounting a disk onto a drive.

(Summary) In order to achieve the above object, the present invention has a permanent magnet for chucking attached to the tip of a rotating shaft of a magnetic disk drive motor when a magnetic disk is installed in a magnetic disk drive device. When the part to be chucked is forcibly brought close to the position where the part to be chucked is completely attracted by the disc holding member and then chucked as a disc, the part to be chucked is mounted so that the disc stored in the jacket can be freely rotated by the motor. The pressing force is automatically removed, and the chucking state is maintained even if unnecessary external force is applied thereafter.

(Example) Hereinafter, the present invention will be explained with reference to an illustrated embodiment.

First, the structure of a small magnetic recording medium (hereinafter referred to as a disk pack) used in this embodiment will be explained with reference to FIG.

When viewed from the disk pack, a magnetic disk 1 made of flexible plastic or the like is rotatably housed in a rectangular jacket 2 made of relatively hard plastic or the like.

A disc-shaped chucked member 6 made of a ferromagnetic material such as an iron plate is fixed to the center of the magnetic disk 1.
A retaining hole 4 is drilled in the center of this chucked member 3 for insertion into a spindle 22a (see FIG.・In addition, the chucked member 6
The same member 6 is provided on both the front and back surfaces of the above-mentioned ginacket 2 facing the
A circular hole 5 slightly larger than the diameter of this member 3 is provided to serve as an opening for pressing the member 3 toward the chucking permanent magnet of the drive device main body. A long hole 6 is formed on the surface to the left of the circular hole 5 (in FIG. 2) through which a magnetic head (not shown) moves in the radial direction while contacting the magnetic surface of the magnetic disk 1. There are also disc packs 10 near both corners of the left edge.
Two small-diameter positioning holes 7a and 7b are provided for determining the mounting position of the disk back 10 when the disk back 10 is loaded into the magnetic disk mounting device 100 (see FIG. 3).

Next K, the above-mentioned magnetic disk mounting device 10 according to this embodiment K
The configuration of 0 will be explained.

As shown in FIGS. 3 to 5, this mounting device 100 includes a chassis portion 20, a halter portion 50. and the lock portion 50 constitute its main body. In the state shown in FIGS. 6 to 5, the disk pack 10 is attached to the mounting device 100.
This figure shows the 60th position of the holding member in the present invention, where the disc is rotated by the driving gear after it has been installed, and later, in the process of inserting the pack 10 into the holder part 30. explain.

First, the chassis section 20 is made of a relatively thick iron plate or the like in a horizontally long rectangular shape, and is composed of a chassis 21, as shown in the plan view of FIG. 3 with the holder section mounted thereon. In the same chassis 2121dK, a support shaft 25 that rotatably holds a holder part 3o, which will be described later, passes through both ends thereof, and the penetrating tip is prevented from being removed by an E-ring or the like, and is inserted into the inner part of the chassis 21. It is suspended horizontally. In addition, both upper and lower edges of the chassis 21 connected to the spindle holding walls 21c and 21d are bent at right angles toward the back side, as shown in Figure @4.5! 21a and 21b are formed.

A lock portion 5o, which will be described later, is attached to one of the mounting walls 21b.

A disk drive motor 22 is attached to the rear surface of the central portion of the chassis 21, where the holder portion 30 is disposed, by an appropriate means. A circular cup-shaped chucking member 23 is fixed to this protruding portion, and a chucking member 230 is provided in the cup to attract and hold the chucked member 6 of the magnetic disk 1. A ring-shaped magnet 24 made of a permanent magnet is fixed.

Next, the holder section 50, which is disposed on the chassis section 20 in an up-and-down manner, is mounted on the chassis section 20 as shown in FIGS. 6 and 4.
The disc pack 10 is made of a steel plate or the like thinner than 1, and has a horizontally elongated rectangular planar shape and has open front and rear end surfaces (left and right end surfaces in FIGS. 3 and 4), and is large enough to fit the disc pack 10 loosely and removably therein. It is mainly composed of a holding member 61 formed in the shape of a small box. This holding member 31 has a bottom portion facing the top surface of the chassis 21 that is almost completely removed and left open, and has a short supporting wall sufficient to prevent the disk bag 10 fitted into the box interior 31f from falling. 31b.

! +10 is only formed by slightly bending the lower edges of both the upper and lower walls toward the inside of the box (5th
(see figure).

The holding member 61 formed in a screw shape in this way has an opening on its right end surface (in FIGS. 5 and 4) that is attached to the disc pack 1.
The opening on the left end face is the inner part, and the holding member 31 is inserted around the support shaft 25 by passing through the support shaft 25 on both the upper and lower walls of the inner part. The holding member 31 is rotatably supported by the chassis 2.
1. It is arranged so that it can rise and fall with respect to the top surface. Further, the holding member 61 rotatably attached to the support shaft 25 in this manner is rotated counterclockwise (in FIG. 4) around the support shaft 25 by the torsion spring 61 wound around the support shaft 25. It has a habit of moving and standing up on the chassis 21 at an angle. That is, the externally extending end of the spindle 25 passing through the spindle holding wall 21d has a -leg end below the holding member 31 (l]l.
A torsion spring 61 is wound around the aperture 59 bored in the l wall, and the other leg end is hung on the retaining wall 21d. #31 is given the habit of rotating counterclockwise around the support shaft 25. The rotation due to this habit is regulated by a stopper pin 21f installed horizontally on the inner surface of the retaining wall 21d.
The transition state position of the holding member 51 which is regulated by and stands obliquely on the chassis 21 is the position where the disc back hill is inserted into and removed from the holding member 31, and this position is the first position in the present invention. It has become.

Also, the upper surface 31d of the holding member 31 (the central part of the chucking member 23 of the motor 22 shown in FIG.
A circular hole 51a corresponding to the circular hole 5 of the pack 1o (see FIG. 2) is bored in a portion corresponding to the hole 31a on the same day.
Inside, a pressing member 53 is provided integrally with the plate 33.
a intervenes.

That is, around the circular hole 31a of the upper plate of the holding member 31, stepped guide shafts 32a, 32b, 62c, 32 are provided with four male screws screwed at diagonal positions of a square.
d is planted. The press plate 63 is made of a small square plate with four small holes drilled in the four corners.
The above four guide shafts 32a, 32b, 32c, 32
d and is disposed on the upper surface 3M, and this pressing plate 36 is inserted into the four guide shafts 52at 52b+.
4 coil springs 34a, 34b, 54c, 34 each having elasticity and tension are wound around 52C and 32d, respectively.
d through °C.

4 presser nuts 55a, 35b, 55c, 35
d is given and attached to the ζ-pressing habit. The chucked member 3 of the magnetic disk 1 is pushed onto the lower surface of the pressing plate 33 (see FIG. 5).
A cylindrical suppressing member 33a is fixed to the magnet 24 so that the suppressing member 33a faces the output shaft 22a of the motor to prevent the tip of the output shaft 22a from colliding with the output shaft 22a. 5 is provided with an escape hole 33b (see FIG. 5).

Further, as shown in FIG. 3, the disk pack 10 is inserted into the holding member -51f from the insertion/removal opening 31e on the right end surface of the holding member 31 so that the side facing the positioning holes 7a and 7b is at the top. The top of the pack M is inserted into the upper surface of the inner part of the holding member 31.
The loading is completed at the position where it collides with the book stopper bins 36a and 56b.

After the disk pack is loaded into the holding member 31, the operation of the lock portion 5o, which will be described later, causes
When the holder part (2) is locked on the chassis part, the disc pack 10 is attached to two positioning pins 2Sc installed near the right edge (in FIG. 3) of the chassis 21. , 26d, and two positioning stepped pins 2 planted near the left edge.
6a, 26b are adapted to engage with the positioning holes 7a, 7b of the pack 10, respectively, and the guide shaft 3 is fitted on the upper surface of the holding member 61.
2a, 32b.

Around the mounting positions of 32c and 32d, there are four rectangular leaf springs 2 each having one end fixed by an appropriate means such as a rivet.
7a, 27b, 27c, and 27d are provided, whereby the upper surface of the jacket 2 is pressed, and a part of the lower surface of the jacket 2 is covered with the stepped bins 26a,
It comes into contact with the stepped portion of 26b. In this way, the disc back 10 is placed inside the holding member 31f.
It is firmly attached, and the front disk 1 is firmly attached.
It is designed so that it can rotate freely within the jacket 2 without coming into contact with obstacles.

Next, the structure of the lock section 50 that locks the holder section 30 on the shear 7@20 will be explained.
l/-knee-) KLyL Ukollko4tbJλa41
←y4/-τjliil On the right side of the wall surface, a locking pin 52 for locking the lock plate 51 is planted, and on the lower right side of the mounting wall 21b on the lower side of the chassis 21, the above-mentioned locking pin 52 is installed. A pin 56 for pivotally supporting the lock plate 51 is erected. Further, a pin 55 is installed on the upper left side of this pin 53 for hooking a tightening coil d screw 54 that urges the lock plate 51 to rotate in the counterclockwise direction. Slightly above the right side of 55 is the lock plate 51.
A menostach hinge 56 is installed to restrict the movement of the shaft to a vertical position. Here, the shape of the sun board 51, whose base portion is loosely and rotatably fitted into the bin 56, will be described in detail. As shown in FIG. 6, the upper end of the lock plate 51 is formed into a triangular shape by cutting off the upper left corner of a small strip-shaped plate, and is provided with a sloped portion 51g. Furthermore, a notch 51b that is slightly wider than the diameter of the lock pin 52 is provided from the upper part of the left end face diagonally upward to the right below, forming a sloped part 51e.
1. Which first 4λml C1b y Jib scoop nn LJ
? A flat portion 51d is provided in the horizontal direction with a length approximately equal to L a=+ M −i 7 width. Therefore,
A beak-shaped tip 51a is formed above the notch 51b, and the claw tip 51c projects downward, and the lowermost end of the claw tip 51C and the flat Comparing the heights of the portion 51d, this flat portion 51d
is slightly higher. Further, when the disc back 10 is completely attached, the lock bin 52 is configured to abut against the back wall of the flat portion 51d.

Further, as shown in FIG. 3, an extensible coil spring 55a is wound around the pin 55 that pivotally supports the lock plate 51, and a stop washer 55b is attached to the tip of the pin 53. The coil spring 53a is fitted with a button to prevent it from falling off.

A lock release mechanism is disposed near the locking portion 5° configured as described above.

That is, on the upper surface of the chassis 21, in the vicinity of the lock plate 51, there is disposed an elongated plate-shaped release arm 57 that extends to the right.This release arm 57 extends above the chassis. A bottle 57aK (gJ) with a protruding end base and an erected bottom part 211C is attached so as to be movable. One end of a tight coil spring 58 is hooked, and the other end of the spring 58 is attached to a bottle 58aK installed on the chassis 21.
It is hung. Then, by abutting against the positioning pin 26d, the release arm 57 rotates counterclockwise T! JJJ is regulated. That is, the positioning pin 26d has two functions: positioning the disc pack recess and acting as a stopper for the release arm 57.

Further, a rounded convex portion 57b is protruded from the side surface of the central portion of the arm 57, and is in contact with approximately the central portion (in FIG. 3) of the inner surface of the lock plate 51, and the arm 57 is connected to the clock. When the lock plate 51 is moved in the direction (B), the convex portion 57b pushes the substantially central portion of the lock plate 51 outward, so that the lock plate 51 is moved counterclockwise, that is, outward in the direction 5 as shown in FIG. The locked state with the lock bin 52 is released.

In other words, the locked state between the lowered chassis portion and the holder portion 3° is released.

Next, the operation of the magnetic disk loading apparatus of this embodiment configured as described above will be explained.

First, the process of attaching the disk back 10 to the magnetic disk mounting device 100 will be explained. As shown in FIG. 8, the lock plate 51 and the four pins 52
The locking state between the chassis section 20 and the holder section 60 is released, and the holder section 30 is rotated counterclockwise by the opening elasticity of the spring 61, as described above.
It is disposed at a first position where it abuts against the stopper bin 21f and opens at a certain angle.

In this state, when the disc back 10 is inserted in the direction of arrow (S) through the insertion/removal opening 51e with respect to the holder part, it will be in the state shown by the dotted line (A) in the holding member 31 and will be correctly loaded. Ru. At this time, the bag 10 is attached to the stopper bin 66a as described above.

The four leaf springs 27a, 27b, 27 are prevented from penetrating further.
c.

27d, the supporting wall 31b is pressed downward.
, 31c Since it is supported by K, there is no chance that this back 1° will fall off. Then, the chucked member 3 of the loaded back fat magnetic disk 1 is pressed by the pressing member 33a.
corresponds to

Next, when the holder portion 30 is rotated clockwise about the support shaft 25, the lock pin 52 comes into contact with the slope portion 51g of the lock plate 51.

Further, when the lock plate 51 is rotated clockwise, the slope portion 51g is pushed by the bottle 52, so that the lock plate 51 is rotated clockwise.
3, the coil rotates clockwise against the elasticity of the spring 54. Then, as shown in FIG. 9, when the holder portion 60 is rotated until the insertion/removal opening 31e comes into contact with the chassis 21, the lock pin 5
Reference numeral 2 indicates the second position in the present invention, in which the mouth becomes 5 so as to come into contact with the claw tip 51C (see FIG. 6) of the lock plate 51.

Moreover, when the holder part 30 operates in this way, the disc bag 10 loaded in the holding member 31 also rotates at the same time.
The chucked member 3 of the magnetic disk 1 approaches the chucking member 23 having the magnet 24. However, at this stage, the magnetic disk 1 inside the jacket 2 is housed with a gap, so that the magnetic disk 1 does not fall within the attraction range of the magnet 24, so that the chassis section 20 and the holder section 3 Even if the opposing surfaces of the chucked member 6 and the chucked member 6 become parallel to each other, the chucked member 6 has not yet reached the attraction range of the magnet 24. However, the two positioning holes 7a and 7b drilled in the jacket 2 and the positioning pins 26a and 26b
Since the tips of the pins 26a and 26b are sharp, they are inserted accurately into the holes 7a and 7b, and the pins 26a and 26b are inserted into the holes 7a and 7b accurately.
a, 7b and the pins 26a, 26b are brought into close contact with each other. Then, as described above, the holder part 30
Immediately before the insertion/removal opening contacts the chassis 21, the suppressing member 33a contacts the chucked member 6. This connects the jacket 2 to the above positioning pin 26a.
26d pushes up, and therefore the pressing member 33a begins to push the member 3 downward, and at the same time as the above-mentioned locking bin 52 passes over the claw tip 51C, the chucked member 3 is pushed up by the chucking member. 23 to the coil springs 34a, 34b.

Since the member 34c and 34d are forcibly pressed down, the member 3 to be chucked can be properly attracted and held by the chucking member 25. At this time, the pressing plate 33
and the guide shaft, S2a, 32b, 32c, 32
A gap (C) (see FIG. 9) is created between the step part d and the pressing plate 36 in this state, since the chucking member 23 and the member to be chucked 3 overlap in parallel, are prohibited from entering. Further, at this time, the tip of the output @22a enters the escape hole 53b provided in the suppressing member 35a, so that collision can be avoided.

Next, as shown in FIG. 6, the lock bin 52 passes over the claw tip 51C and reaches the state shown in FIG. The holding member 31 moves back counterclockwise due to the elasticity of the legs, and the lock plate 51 is pulled by the coil spring 54 (see FIG. 9) and rotates counterclockwise about the support pin 53. Therefore, the lock pin 52 is attached to the lock plate 51.
It slides to the upper right on the slope portion 51e, and eventually stops when it hits the back wall of the flat portion 51d. At this time,
The shear 7 part 20 and the holder angle part 30 are parallel to each other and are in a locked state as shown in FIG. 4.

In the third position shown in FIG. 4, the magnetic disk mounting device 100 performs magnetic recording and reproducing operations.

In this state, the disc tsuku tsuku rooster has 4
The book leaf springs 27a, 27b, 27c, 27d
The two positioning stepped pins 26a, 26b and the two positioning pins 2
6c and 26d, and there is a gap (D) between the suppressing member 33a and the chucked member 6.
(see FIG. 4) is maintained, the magnetic disk 1
can rotate together with the rotation of the output shaft 22a of the motor 22. Further, in this state, even if a downward force is applied to the holder part, the lock bin 52 is locked to the flat part 51d and the holding member 61 does not move, so the magnetic disk 1 is stabilized. can be rotated.

Next, the operation of taking out the disk pack 10 housed in the holder section 60 from the magnetic disk mounting device 100 will be described. When the release arm 57 is moved toward the lock plate 51 in the state shown in FIG. 3, the convex portion 57b comes into contact with the lock plate 51, and as shown in FIG. push it to move. Then,
The lock plate 51 rotates counterclockwise (in FIG. 7) against the elasticity of the coil spring 53a wound around the pin 53, and eventually the lock pin 52 and the lock plate 51 is disengaged from the notch 51b.

Then, as described above, due to the spring elasticity of the spring 61, the holder part 60 rotates counterclockwise about the support shaft 25, and is stopped by the stop horn (pin 21f). To explain the operation during this time in detail, when the lock is released and the holding member 61 starts to stand up from the chassis 21, the disk pack 10 moves against the supporting walls 31b, 51C of the holding member 61. (see Fig. 5) by the elasticity of the springs 27a to 27d, and moves slightly upward (in Fig. 4).However, in this state, the magnetic disk 1 is still attracted to the chucking member 23. When the holder portion 60 further rotates, the circumferential portion of the circular hole 5 of the jacket 2 and the outer circumferential portion of the chucked member 3 of the magnetic disk 1 engage with each other. The spring 61
Since the elasticity of the chucking member 26 is stronger than the attraction magnetic force of the chucking member 26, the chucked member 3 and the chucking member 23 are separated, and eventually, as shown in FIG. The section 30 and the chassis section 20 are
It will stop at the first position with a predetermined angle of inclination.

In which state is the insertion/removal opening 3 of the holder part 30
By pulling out the disk pack 10 from 1e in the direction of the arrow ('I') (see FIG. 8), the pack 10 can be taken out from the magnetic disk loading device 100.

Fifth, according to this embodiment, the disk pack 1
0 is loaded into the holder portion 30, and by the action of the claw tip 51C provided on the lock plate 51 on this port, the suppressing member 35a is sure to come into close contact with the chucked member 3 and the chuck Since it is pressed against the king member 23, even if an inexpensive and small permanent magnet with relatively weak attraction force is used, it can be completely attracted and held. Further, when the holder part 30 is in the locked state locked to the chassis part 20, a gap (D) (see FIG. 4) is secured, so unnecessary friction is eliminated when rotating the magnetic disk 1. is zero. In addition, when releasing the locked state, the route is completely different from that when installing, so the force required for releasing can be reduced. Even if the locked state is released while the disk drive motor 22 is rotating, Even if it is released, no overload will be applied to the motor 22, so there is no risk of damaging the motor 22.

In addition, in this British embodiment, the coil springs 54a and 34b.

34c, 34d and the guide shafts 32a, 62b, 32c
, 32d provided a pressing function, as shown in FIG. It may be attached to. In this modification, in order to provide so-called preliminary tension, the first
As shown in FIG. 1, the leaf spring 71a is bent in advance, or as shown in FIG.
A spacer 72 is interposed between 1 and the leaf spring 71b,
By attaching the plate spring 71b at an angle in advance, the force of the suppressing member 53a to press the chucked member 3 can be stabilized. According to such means, the suppression mechanism can be simplified and its protruding portion can be made smaller, so that the mounting device 100 can be made smaller.

Moreover, as shown in FIG. 13, the pressing member 35G is made of rubber (
For example, it may be made of neoprene rubber (neoprene rubber, etc.) or plastic with spring properties, and may be fixed to the holding member 31.

Furthermore, if a plurality of circumferential grooves 33e are formed on the outer surface of the suppressing member 55d as shown in FIG. 14, the pressing pressure will be further stabilized, the structure will be simple, and it will be possible to make it easier to work in the morning and reduce costs. It becomes possible.

Although the holder part 30 of this embodiment is formed of a rotating holding member 61 with a fulcrum, it is possible to insert and remove the disk pack 10 almost parallel to the chassis s20 using a parallel pantograph or the like. The same effects as in this embodiment can also be obtained by using a so-called horizontal mounting method in which the sensor is moved in parallel onto the chassis section 20.

(Effects) According to the present invention, in the process of mounting the disk pack, the disk pack is forcibly pushed in so as to minimize the gap between the chucked member of the magnetic disk and the chucking member having a permanent magnet. Even if an inexpensive, small, and weak permanent magnet is used, the magnetic disk can be reliably chucked, and when the magnetic disk is removed, it takes a different path than when it is attached, so it requires less force. However, it is possible to release the four-handed state.

[Brief explanation of the drawing]

FIG. 1 is a characteristic diagram showing the relationship between the attractive force of a permanent magnet and the gap between the attracted object. FIG. 2 is a partially cutaway perspective view of a disk pack loaded into the mounting device of the present invention. , FIG. 5 is a plan view of a device for mounting a magnetic disk to a drive device showing an embodiment of the present invention; FIG. 4 is a front view of the lower surface shown in FIG. 6 with the trap partially broken; FIG. 5 is a sectional view taken along line v-v in FIG. 3 with l'f=j5, FIG. 6 is an enlarged view of the tip of the lock plate shown in FIG. A side view of the main part for explaining the operation of the lock plate shown in FIG. 4 above, and FIG. 8 is a front view showing the unlocked state of the magnetic disk loading device shown in FIG. 3 above. 9 is a front view showing the operating state of the magnetic disk mounting device shown in FIG. 6 during the mounting process, and FIGS. 10 to 14 are
FIG. 4 is a front view showing other modifications of the suppressing member of the magnetic disk mounting device shown in FIG. 3 above. 1...Magnetic disk 3...Chucked member M...
-Disk pack 20---Chassis part 21...Chassis 23...Chucking member 24...Magnet 25...Spindle 30...Holder part 61...
Holding member 50... Lock capital 51... Lock plate 52...
-Lock bin 53-...Bin 57...Three release arms...Magnetic disk N device Flea '10 Prisoner horse 12 Prisoner sale 13 Prisoner 6144

Claims (1)

[Claims] A magnetic disk, which is housed in a jacket and has a chucked member made of a ferromagnetic material or the like in the center, is lifted by a chuck part made of a magnet fixed to the shaft of the motor of the main body of the drive device. The member to be chucked is attached to the shaft, and the jacket is held in a magnetic disk drive device adapted to rotate the magnetic disk by the motor. a holding member displaceably held between a first position for disengaging the jacket and a second position for coupling the magnetic disk in the jacket to the shaft of the motor; and a holding member provided on the holding member. suppressing means for pressing the chucked member of the magnetic disk in the jacket toward the chuck portion through an opening provided in the jacket; a locking member for holding in a third position, the third position being a position where the distance between the holding member and the drive device main body is greater than that in the second position, and the locking member The holding member moves from the first position to the second position.
A magnetic disk mounting device is characterized in that a magnetic disk mounting device performs a locking operation only when the magnetic disk mounting device is displaced so as to reach a third position.